Samsung original 16GB, (2 x 8GB) 240-pin DIMM, DDR3 PC3-12800, desktop memory module Module Size: 16GB kit ( 8GB x 2 ) Package: 240-pin DIMM Feature: DDR3 PC3-12800 Specs: DDR3 PC3-12800 , CL=11 , Unbuffered , NON-ECC , DDR3-1600MHz , 1.5V , 1024Meg x 64 Lifetime warranty. Compatible to desktop PC's only. Please, make sure, your desktop supports 8GB ram per slot.